Check protector



c. o. LAWRENZ CHECK PROTECTOR Feb, 5, 1929. 1,701,328

Filed June v, 1928 Patented Feb. 5, 1929.

UNITED STA vCHECK PROTECTOR..

- Application filed .Tune 7,l

rI'his invent-ion relates to improven'ients in check protectors. y

`he principalobject of the invention is to provide an improved device of the class mentioned that can conveniently be carried in a pocket or purse for use when required.

A further more specilic object is to provide a protector one form of which has a rotatable perforating wheel the handles or linger pieces of which are partially housed within. recesses in the wheel to provide a relatively thin, compact device.

Other objects of the invention relate to various features-of construction whereby a device is provided which can be manufactured at a cost of only a few cents and which will be effective in operation, not only in preventing the alteration of checks, but in safe-guarding the signature or other written portion of any document on which the device may be used.

In'the drawings:

Figure 1 is an elevation of a device embodying the present invention.

Figure'Q is a side elevation-thereof.

Figure 3 is a diametrical sectionalvicw talren on the line 3 3 of Figure 2.

Figure 4 illustrates a modified form of device.

Figure 5 is a broken view of a perforating Y wheel of modilied construction, and

Figure 6 is a sectional View ltaken on line G-G of Figure 5. Y The form of the invention shown in Figures 1 to 3 inclusive comprises a perforating wheel indicated generally bythe numeral 10.

The wheel has av cylindrical flange 11 andan integral web 12 provided in its center with an opening for receiving a short shaft 13 which is preferable oppositcly threaded at its ends. The threaded portions of the shaft v are of slightly less diameter than the central cylindrical bearing portion, whereby vshoulders 14e, Mare formed, as shown in Figure 3.

The finger pieces 1.5, 15 are tapped to receivc the threaded ends of the shaft, and as they are screwed into position the shoulders 11 space the pieces to provide sufficient clearance to prevent binding of the same on the side walls of the wheel and also cause the pieces to frictionally lock in position.

11s shown, the pieces 15v are housed within recesses 16, 16 in the wheel 10', kthe provision of which permits the use of finger pieces of sufficient thickness to accommodate adequately deep threaded holes for receiving the shaft,

192s. seriai Nb. 28u43.

whereby a deviceof lsturdy construction-is provided and Of'a relatively .flat disk-like 'i shape.

The periphery ofthe wheel10 may be provided with numerous teeth or points 17 which will. readily -perforate a paper 18, as shown in Figure 3, as the wheel is rolled'over it, or the wheel may have perforating projections of other configuration, such as the L shaped edges 19 shown in Figures 5 and 6.

In Figure 4 a wheel 20 is shown in which the finger ypieces 21 are not housed as in the above described form of the invention, but are carried on the ends of theshaft 13 entirely eXteriorly of the wheel. Theshaft I has shoulders14, similar tothe form described above, and may also have yright and left threads for convenience in assembling the device. The finger pieces 21 are provided with finger recesses 22. i

In use the protector is held firmly by the linger pieces, the wheel rotating On the shaft asthe device is rolled across the portion of the check kor other document to be protected against alteration, sufficient downward-.pressure being exerted to cause the projections to kcut into the paper whereby subsequent erasures can not be made without mut-ilation.

AlthoughI have shown and described certain features of the invention for the purpose l A l1,701,323. TES4 PATENT OFFICE.

of illustration, I donot wish to be restricted specifically thereto except where so limited.

by the appended claims.

What I claim is: K

1. A device of the'class described compris- `ing a rotatable wheel having perforating projections on. its periphery, an axial opening being provided in said wheel, a relatively rotatabl-e shaft in said opening extending beyond both side walls of said wheel, andnger pieces secured to the ends of said Shaft.

` A device of the class described comprising a wheel having pcrforating projections on its periphery andfhaving recesses in its .opposite side walls, finger rpieces housed in said recesses, and a shaft passing axially through said wheel and having its ends opypositely 'threaded one to each of said lingerv pieces.

3. .A device Of the class described comprising a rotatable perforating wheel having an axial Opening, a shaft in lsaid Opening having its ends oppositely threaded and extending beyond the respective side walls of said wheel, said threaded portions of said shaft being Of reduced diameter whereby shoulders are provided, and linger pieces having threaded recesses of greater depth than the threaded portions of said shaft whereby said pieces can be turned onto said shaft into frictional engagement With said shoulders.

4. A device of the class described comprising` a perforating Wheel having an axial opening therethrough, Ca shaft extending through said opening and beyond the side Walls of said Wheel, the ends of said shaft being reduced in diameter to form shoulders, and finger pieces having axial recesses for receiving said reduced portions of said shaft and being secured on said portions against the respective shoulders in spaced relation with respect to the adjacent side Walls of said Wheel.

CARL O. LAVRENZ. 

